<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Test Result</title>
    <script>
        function showAlert() {
            var account_id = "{{ account_id }}";
            var content = "{{ content }}";
            alert("Account ID: " + account_id + "\nMessage Sent: " + content);
        }
    </script>
</head>
<body onload="showAlert()">
    <!-- The rest of your HTML content here -->
</body>
</html>